加设软钢阻尼器的RC高层框架减震性能数值模拟
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摘要
采用有限元软件建立模型,对加设软钢阻尼器与未加阻尼器的RC高层框架结构两种模型进行了动力时程分析,总结了软钢阻尼器对RC高层框架结构的减震效果及特点。结果表明:1)软钢阻尼器对结构的整体刚度有一定的提高,在地震作用下,对结构的加速度反应及位移反应影响较大,减震效果明显。2)软钢阻尼器能增大结构的延性,较大程度地减少结构在罕遇地震作用下塑性铰的数量。3)通过动力数值模拟分析表明,RC高层框架结构体系适于加设软钢阻尼器进行减震,尤其对整体抗震性能需要提高的结构减震效果明显。
Finite element software was adopted to generate two analysis models of RC structure which one is the origin structure and another is added HADAS,and analyzed the shock absorption effect and characteristics of HADAS based on the dynamical and time-history analysis.The result shows that: 1) HADAS will improve the integral stiffness of structure;under the earthquake effect,it has great effect on the acceleration response and displacement response,shock absorption obvious.2) HADAS has great effect on increase the ductility of structure,can reduce the number of plastic hinge of the structure under the action of the rarely met earthquake.3) Through dynamic numerical simulation,showed that the RC structure adding HADAS is very applicable,especially for the system structure which needed improve earthquake resistant behavior integral,the shock absorption effect is obvious.
Finite element software was adopted to generate two analysis models of RC structure which one is the origin structure and another is added HADAS,and analyzed the shock absorption effect and characteristics of HADAS based on the dynamical and time-history analysis.The result shows that: 1) HADAS will improve the integral stiffness of structure;under the earthquake effect,it has great effect on the acceleration response and displacement response,shock absorption obvious.2) HADAS has great effect on increase the ductility of structure,can reduce the number of plastic hinge of the structure under the action of the rarely met earthquake.3) Through dynamic numerical simulation,showed that the RC structure adding HADAS is very applicable,especially for the system structure which needed improve earthquake resistant behavior integral,the shock absorption effect is obvious.
引文
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[2]周云,等.耗能减震技术研究与应用的新进展[J].地震工程与工程振动,1999,19(2):122-31.
[3]王亚勇,薛彦涛,等.北京饭店消能减震加固分析与设计[C]//时程分析法国际结构控制与健康诊断研讨会,深圳,2002.
[4]吕西林,蒋欢军.复杂高层建筑抗震与消能减震研究进展[J].建筑结构学报,2010(6).
[5]常业军,苏毅,程文瀼.某工业建筑采用黏弹性消能支撑的减震设计研究[J].土木工程学报,2006(1).
[6]翁大根,张瑞甫,张世明,等.基于性能和需求的消能减震设计方法在震后框架结构加固中的应用[J].建筑结构学报,2010(S2).
[7]周云.金属耗能减震结构设计[M].武汉:武汉理工大学出版社,2000.
[8]GB50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2002.
[9]裴星洙,方鹏凯.设置软钢阻尼器的钢框架消能减震性能研究[J].江苏科技大学学报,2009,23(1).
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